They aren't that fragile. My Dad has my old iPhone 4, it's never been kept in a thick plastic or silicone case, and it still looks nearly as good as new despite now being 6 years old (and on its original battery!)

My iPhone 6 which replaced it, when it came out, has never been in a case. It rattles around in my pocket with everything else in there. It's now 2 years old and still looks practically brand new despite never having been in a case and having been dropped once or twice.

They aren't anywhere near as fragile as people think. They are actually pretty tough.

Actually, their constitutional authority to exist is that the Executive Branch calls them into existence to execute the provisions of laws passed by the Legislative branch.

It took a constitutional amendment to ban alcohol, and that amendment has been repealed. This leaves no authority for any branch of the government to prohibit the manufacture, sale, or use of any drug. Any act of the congress that purports to do so is not a law at all, it is as James Madison would describe it, a usurpation.

First of all, fatalities aren't the only accidents. Secondly, you don't have to drive them a hundred million miles to get a statistically significant sample. Thirdly, it's not just trucking companies, but their insurance carriers and all of their customers who will want to see this legislation.